Gttstaf dalen



G. DALEN.

INCANDESCENT GAS LAMP.

' APPLICATION mso nov.14. |915.

Patented Sept. 9, 1919.

UNITED STATES PATENT OFFICE;

GUs'rAF DALN, oF LIDINGN, sTooKHoLM,.sWEDEN, `AssmNoR To sVENsKAAKTIEBOLAGET GAsAcoUMULAToR; oFsTocKHoLM, svviinmv.`

INCANDESCENT GAS-LAMP.

Specification of Letterslatent.

1 *PatentedlSeptf); 191592 To all wiz/mn. it may concer/n lle it knownthat l, (lusrinp DALN, engineer, residing at Skiirsiitra, Lidingn,Stocldiolm, Sweden, have invented certain new and useiul Improvements inIncau descent Gasdlainps, of which the 'following is a specification.

In incandescent gas lamps the incandescent mantle usually is sluroundedby a glass globe. to the interior ot which the at1nosplieric air has a'Free entrance and 'from which the combustion gases, especially when thelamp in question is adapteiil lior lighting railway carriages, escape`through a chi1n ney, the construction of which is more or lessvoluminous and eoniplicated. The air supply to the interior ot saidglass globe mainly has Jor object to admit the necessary air otconlbustion to the incandescent mantle. The said chimney 'for carryingaway the comlmstion gases however in some eases occasions manyiiufom'eniences, as the lalnp onlyT can be mounted on such places, whereit is possible to arrange the chimney opening into the atmosphere.l\l`oreover said chimney is very expensive and occupies a very largeplace.

The present invention has Alor its object to avoid these inconveniencesby conducting away the gases oi! combustion under pressure from theinterior olf the glass glolic through a common pipe conduction, whichmay be only slightly thicker than the gas supply pipe, and thus may beconducted to the atmosphere from any place, where the lamp desired to beapplied. In order to obtain the necessary pressin'e in the interior olthe lamp globe. said interior is hermetically closed to the atmosphere,and the 1nix ture of gas and air is supplied to the burner underpressure.

0n the drawing a vertical section oi' the lower part olf the gas lampaccording to this invention is shown.

l indicates the lamp casing, in which is arranged a supply pipe tor gasand air mixture, containing air in such a )ropertion as to establish acomplete coml ustion both .in the burner and at the incandescent mantle.Such gas air mixture may be gener ated in any suitable apparatus iorpreparing a gas and air mixture in predetermined proportions underpressure.

At the end ol said casing the btu'ner 3 and the holder 4f for theincandescent mantle 5 are provided. The holder l is adapted for aninvert incandescent body in the usual manner.

Surrounding the incandescent mantle 5 is provided a globe G, which ishermetically fixed in any suitable manner to the lamp casing l, as bymeans oi flanges S, 9 on said casing, between Which the globe is tightlyfixed. In the lamp casing is arranged an outletp/ipe 7,1co1n1n1mieatingwith the interior of the lamp globe and leading out to the atmosphere.In other regards the interior of the lamp globe is hermetically closed.Through the outlet casing l0 circulating air may be conducted ii'desired. 11 indicates a valve or cock, by means ol. which the supply oitgas and air mixture to the burner 3 may be opened or closed.

It Will be clear 'from the specification above that no additional air issupplied neither to the burner nor to the incandescent mantle, ashitherto usually has been the ease, but that the whole quantity ot air,

necessary to obtain a complete combustion both in the burner and at theincandescent mantle is present in the gas and air mixture, suppliedtlni'ough the conduit 2. Said gas and air mixture is prepared inpredetermined proportions and is supplied under pressure, and as theglobe 6 is hermetically closed against the atmosphere a pressure abovethat ofi the atmosphere is prevailing in the interior ot the globe G, sothat the gases ol combustion are forced out under pressure from saidinterior against the pressure of the atmosphere through the outlet pipe7 The gas lamp thus is provided only with a supply pipe 2 for gas andair mixture, and with an outlet pipe 7 for the gases of combustion.

12 indicates an outer glass globe, surrounding the inner globe 6 andsuspended in the usual manner on the lamp casing.

What I claim as my invention is:

In combination, a hollow casing provided at one end with a fittinghaving an inlet bore and an exhaust bore, a pipe located in the casingand connected to the inlet bore for conducting air and gas inpredetermined proportions, and under pressure, to said inlet bore, aburner connected with the inlet bore, a mantle into which the burneropens, a globe surrounding the mantle, the outlet bore being theonly-means of placing the interior vof the globe il encatn with In.testloy whereof I have signed my the atmosphere, and a plpe located 111the name t0 dus speelfieatlon 111 the presence of easmg and connected tothe outlet bore of two subserlbmg wltnesses.

the fitting for conducting the products of GUSTAF DALEN. combustion awayfrom the globe under the VtnesSes:

pressure arising from the pressure of the WALDEMAR BOMAN,

incoming air and gas. GRETA PRIEN.

Copiel of this patent may be obtained forve cents each, by addressing`che Commissioner of Patents, Washington, D. C.

